Change declared variable name in gfx::ScaleTo*Size.

ui/gfx/geometry/size.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_GEOMETRY_SIZE_H_
 #define UI_GFX_GEOMETRY_SIZE_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 70 matching lines @@
 
 // This is declared here for use in gtest-based unit tests but is defined in
 // the gfx_test_support target. Depend on that to use this in your unit test.
 // This should not be used in production code - call ToString() instead.
 void PrintTo(const Size& size, ::std::ostream* os);
 
 // Helper methods to scale a gfx::Size to a new gfx::Size.
 GFX_EXPORT Size ScaleToCeiledSize(const Size& size,
                                   float x_scale,
                                   float y_scale);
-GFX_EXPORT Size ScaleToCeiledSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToCeiledSize(const Size& size, float scale);
 GFX_EXPORT Size ScaleToFlooredSize(const Size& size,
                                    float x_scale,
                                    float y_scale);
-GFX_EXPORT Size ScaleToFlooredSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToFlooredSize(const Size& size, float scale);
 GFX_EXPORT Size ScaleToRoundedSize(const Size& size,
                                    float x_scale,
                                    float y_scale);
-GFX_EXPORT Size ScaleToRoundedSize(const Size& size, float x_scale);
+GFX_EXPORT Size ScaleToRoundedSize(const Size& size, float scale);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_SIZE_H_